The concept of the game was very interesting, and I am a big fan of the art and music, but the gameplay was slightly confusing.
The low-resolution sprites were detailed enough to make sense and the music was nice to listen to and not out of place. However, I can see at least 3-4 colours used. It was almost impossible to complete many of the levels in less than a few attempts due to not knowing the positions of the vampires, and I only managed to complete the final level through brute force, as there was not much explanation of how the blood loss mechanic works. Despite all this, it was a fun experience.
Overall, an interesting idea with a little more explanation required.